Water testing & Pasteurization in Africa

Water testing & Pasteurization in Africa

A guide to water testing without access to a laboratory, and how to pasteurize contaminated water using sunshine and a simple solar cooker.

Date(s): June 6, 2006. Album by Bob Metcalf. Photos by Bob Metcalf. 1 - 24 of 112 Total. 57645 Visits.

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1 Water - Safe to Drink? Nepal	2	3	4
5	6 Mwamongu Village water source, Tanzania	7 Water source in Dar es Salaam, Tanzania	8
9 The presence of the bacterium Escherichia coli indicates recent fecal contamination of water.	10 Water tests should provide this information	11	12
13	14 Components of the Portable Microbiology Laboratory with Colilert and Petrifilm tests for E. coli	15 Old, inexact methods on the left, to be replaced by modern tests for E. coli, right	16 Portable Microbiology Laboratory. Materials for 25 water tests in gallon-sized plastic bag
17 Bob Metcalf holds the two Portable Microbiology Laboratory tests: Colilert MPN tube, and E. coli count Petrifilm.	18 Colilert: A presence/absence test for E. coli in 10 ml of water.	19 Colilert is an approved water testing method in 35 countries	20 ONPG and MUG are the two substates for E. coli in Colilert
21 How to use Colilert MPN. Collect water in sterile WhirlPak (open well in Temeke Municipality, Dar es Salaam, Tanzania)	22 Carefully remove cap from Colilert tube	23 Use sterile pipette to add 10 ml of water source	24 Carefully replace cap

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